1750329

Appears in sequences

• Numbers of form 7^i*9^j, with i, j >= 0.at n=31A025631
• Squares that are a difference between 2 positive cubes.at n=20A038596
• Squares expressible as the sum of two positive cubes in at least one way.at n=26A050802
• Seventh column of triangle A067417.at n=5A067422
• Permutational numbers A134640 which are squares.at n=10A134741
• Numbers with 35 divisors.at n=8A175745
• Numbers with prime factorization p^4*q^6.at n=8A190464
• T(n,k)=Rolling cube footprints: number of nXk 0..7 arrays starting with 0 where 0..7 label vertices of a cube and every array movement to a horizontal or antidiagonal neighbor moves along a corresponding cube edge.at n=25A223331
• Rolling cube footprints: number of 5Xn 0..7 arrays starting with 0 where 0..7 label vertices of a cube and every array movement to a horizontal or antidiagonal neighbor moves along a corresponding cube edge.at n=2A223334
• Squares that are both a sum and a difference of two positive cubes.at n=2A230717
• Squares which have one or more occurrences of exactly seven different digits.at n=20A235722
• Perfect powers of the form x^3 + y^3 where x and y are positive integers.at n=31A267088
• Perfect powers of the form x^3 + y^3 where x and y are distinct positive integers.at n=22A267416
• Magic sums of 3 X 3 semimagic squares of squares whose rows, columns, and at least one of the two main diagonals sum to the same number.at n=11A271021
• Integers k such that both k and k^3-1 are the sum of two positive cubes (see A003325).at n=5A271717
• Numbers n such that n^3-1 is a sum of cubes in 1 way and a difference of cubes in 2 ways.at n=29A281789
• a(n) = A248101(A277324(n)).at n=42A284564
• Smallest number having exactly n divisors ending with 3 or 7.at n=16A331082
• a(1)=1; for n > 1, a(n) is the smallest number that has n divisors and is coprime to a(n-1).at n=34A351166
• a(n) is the least number with exactly n divisors of the form 4*k+3.at n=17A364585